Stanchion cover



FIG. 1 is a front view of the stanchion cover embodying the ornamental design;

FIG. 2 is a left side elevational view of FIG. 1 and a mirror image of the right side elevational view;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a stanchion cover, as shown and described. 